505 million years
or 123 meters to today
Geological era: Paleozoic / Cambrian
The oxygen content in the sea rises sharply, and within 5–10 million years most of the blueprints for the creatures that still exist today are created. Fish are the first creatures with an internal skeleton and flexible spine. They are “two-sided animals”. This construction plan is so successful that the age of fish begins. The foundation for the development of all other vertebrates, including humans, is thus laid.
During the Cambrian, the earth’s climate becomes warmer and warmer. The polar caps melt, and the sea level rises sharply. Finally, the continents are largely flooded by shallow seas. The land masses are mainly located in the southern hemisphere. Extensive deserts stretch out in their interior. The climate is hot and humid.